Lots of things are unknown on both sides of the war. Inadequate documents at the time, destruction of other documents after the war, and the death of most of the participants all have left may questions unanswered.

Furthermore there appears to be many more German photos compared to allied-every German appears to have had a camera. For example my father-in-law who was in the war from 14 Aug 40 to the end has precisely none

That does not explain the lack of interest when pictures surfaces. On eBay uk almost no original pictures are to be found. On eBay usa enough. I would have thought that people would cherish new original (non goverment) findings, as is the case in things related to the Luftwaffe.

Germans seem to have enough film till mid 1942 after that the supply and pictures become less abonded .

Furthermore there appears to be many more German photos compared to allied-every German appears to have had a camera. For example my father-in-law who was in the war from 14 Aug 40 to the end has precisely none

Also who the people taking pictures were. Allied soldiers would not be bringing cameras with them and anyone fleeing would not be taking a camera with them but anyone who was out of the calamity a bit might have more chances.